and his inspiration before, robert de niro in this movie. >>> good evening. and thanks for being here on a sunday night, as we do begin with that anxious wait. world leaders wondering if and when north korea will make a move. after weeks of escalating threats, some believe a missile launch could come at any moment. it is already monday morning in north korea. and they are celebrating the birthday of that country's founder, kim il-sung. that's him on the left there. his grandson, kim jong-un on the right. and he is the young and untested leader behind the escalating rhetoric and tensions with the south. and from south korea tonight, this image, mocking the grandfather and grandson, after north korea rejected a new offer from the south to ease tensions. abc's bob woodruff, standing watch in seoul, south korea, again tonight. >> reporter: for secretary of state john kerry, japan is the last and arguably most tense leg of his asian tour. while he spent some of his time visiting public sites, the bulk of the day was about solving the crisis with north korea. >> th